Sparrow has updated its minimalist email client for Mac OS X to Sparrow 1.3.1. The minor release focuses on a critical bug that was affecting version 1.3, which, as the company mentions in a blog post, introduced a number of more-significant changes, including full compatibility with Mac OS X 10.7 Lion, improved access to labels and folders via the sidebar, and an integrated “send and archive” feature. In addition, the Sparrow team has rewritten all of the app’s animations, making its user interface smoother and more interactive. ($9.99 new from Sparrow or from Mac App Store, free update, 14.8 MB)
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